XML 90 R76.htm IDEA: XBRL DOCUMENT

Exploration in operating units (Tables)

12 Months Ended

Dec. 31, 2017

Disclosure Of Exploration In Operating Units [Abstract]

Disclosure of detailed information about exploration and evaluation assets [Text Block]

This caption is made up as follows

		2017			2016			2015
		US$(000)			US$(000)			US$(000)

Services provided by third parties			79,837			78,996			72,613
Consumption of materials and supplies			8,236			12,779			10,298
Direct labor			2,373			1,989			2,287
Rentals			1,527			1,603			859
Electricity and water			1,328			21			7
Transport			587			321			238
Maintenance and repair			100			62			30
Insurance			-			116			135
Other minor expenses			940			262			3,232
			94,928			96,149			89,699